.container {
    margin-top: 10px;
}

h3 {
    font-size: 18px;
    padding: 0;
}

.bg-success,
.bg-danger {
    padding: 5px;
    margin: 5px 0;
}

.nav {
    margin: 20px;
}

.nav .nav-list {
    list-style: none;
}

.nav .nav-list .nav-item {
    display: inline-block;
    margin: 5px;
    padding: 5px 8px;
    border: 1px solid #ccc;
}

.nav .nav-list .nav-item.active {
    background: #337ab7;
}

.nav .nav-list .nav-item.active a {
    color: #fff;
}

.image-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

.image-list .image-item {
    width: 220px;
    height: 260px;
    margin: 10px;
    border: 1px solid #ccc;
    text-align: center;
    transition: background-color 0.2s;
}

.image-list .image-item:hover {
    background: rgba(255, 0, 0, 0.1);
}

.image-list .image-item img {
    width: 200px;
    height: 200px;
    margin: 10px;
    border: 1px solid #ccc;
}

#uploadSuccess {
    display: none;
}

#uploadFail {
    display: none;
}
